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Sep 10, 2020 at 16:41 vote accept Penelope Benenati
Aug 24, 2020 at 11:17 comment added Penelope Benenati @AlexRavsky your intuition is correct and is explained here: math.stackexchange.com/questions/1996000/… However, it is not clear how to formally exploit this recursion for the final goal of the problem (for instance by using an induction based on this recursion).
Aug 24, 2020 at 8:01 comment added Alex Ravsky I guess when $1\le r\le\sqrt{2}$ then the intersection is the ball with cut $2d$ hats of height $r-1$, so its volume can be easily calculated. When $\sqrt{2}\le r\le \sqrt{d}$ then the intersection seems to be the cube with spherically cut $2^d$ corners. Maybe there is a way to calculate a volume of such corner too, for instance, by induction with respect to $d$.
Aug 21, 2020 at 0:50 history answered fedja CC BY-SA 4.0